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GENERAL39927
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GENERAL39927
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Last modified
8/24/2016 7:59:15 PM
Creation date
11/23/2007 10:25:52 AM
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Template:
DRMS Permit Index
Permit No
M1988112
IBM Index Class Name
General Documents
Doc Name
AGENDA FOR 9-20-99 MEETING
Media Type
D
Archive
No
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Geochemical Characterization <br />• Sulfide minerals in the Precambrian bedrock oxidized during the <br />period of time when the West Pit was dewatered. <br />• Re-establishment of the hydrology in the vicinity of the West Pit <br />flushed the products of oxidation into the backfill from the <br />Precambrian bedrock. <br />• Secondary minerals also are flushed from the backfill material <br />• Carbonate minerals in the backfilled Santa Fe Formation react with the <br />material flushed from the Precambrian bedrock to neutralize the pH <br />and produce acalcium-sulfate-bicarbonate groundwater that carries <br />manganese from the backfill into the alluvial aquifer. <br />
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